Moroso 64947 Carburetor Spacer 1 inch 4150/4160 Open Plenum Phenolic

The Moroso 64947 is a high-performance carburetor spacer designed for 4150/4160 style carburetors. This 1-inch tall open plenum spacer is constructed from phenolic material, which provides excellent heat insulation properties to help keep fuel cooler and reduce the risk of vapor lock.

Key Features:

• Open plenum design improves air distribution and throttle response
• Phenolic construction resists heat transfer from intake to carburetor
• 1-inch height provides optimal plenum volume for most applications
• Compatible with Holley 4150 and 4160 series carburetors
• Helps increase horsepower and torque by improving airflow dynamics

Carburetor spacers are a proven method to improve engine performance by increasing the distance between the carburetor and intake manifold, allowing for better fuel atomization and more complete air/fuel mixing. The phenolic material stays cooler than aluminum alternatives, making this spacer ideal for street and strip applications where heat management is critical.